#include <iostream>

using namespace std;


class Student{
private:
    int id;
    string name;
    int sex;
    int age;
public:

};

int main()
{
    string name="";

    name = "shao";
    int i;
    cin >> i;
    cout << "Hello world!"  << i << endl;
    cout << name <<endl;
    name += "ming";
    cout << name <<endl;
    return 0;
}
